PERMFILE119567

• Permit No: C1980001
• IBM Index Class Name: Permit File
• Doc Date: 1/8/2007
• Section_Exhibit Name: 2.5 Hydrology
• Media Type: D
• Archive: No

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of Trout Creek and the Yampa River near Milner, Colorado, in Routt County.
Portions of the Oak Creek watershed contain the mine office and loading
facilities and are included within the permit boundary. The headwaters of Oak
Creek are in the vicinity of Sand Point and the confluence of Oak Creek with
the Yampa River is about five miles south of Steamboat Springs, Colorado, as
shown in Exhibit 2.5-1.
All three major tributaries of Trout Creek enter the stream below the
Edna Mine and will be unaffected by the proposed mining operations.
Therefore, the discussions in this document are restricted to the Trout Creek
and Oak Creek watersheds contributing above the downstream limit of the Edna
Mine. These watersheds were subdivided into hydrologic units for the purpose
of analyzing runoff. Table 2.5-1 lists several physical characteristics of
the Trout Creek watershed and similar data for the Oak Creek watershed are
given in Table 2.5-2. In both cases, the drainage point of the last unit
listed corresponds to the point where the stream leaves the permit boundary,
approximately. Both watersheds are characterized by steep side slopes and
high elevation head waters. Trout Creek is substantially steeper throughout
the reach of interest than is Oak Creek. Currently, Trout Creek
Mid-term '94
2.5-2a September 15, 1996